Trying to upgrade to Firefox 3.6 on a Mac, 10.4.11. I'm being told I don't have sufficient priviledges. ??? (Thanks)

Having trouble trying to update to Firefox 3.6. I'm told I don't have sufficient privileges. Help is appreciated.

This happened

Just once or twice

== trying to update to Firefox 3.6 on a Mac, OSX 10.4.11

Having trouble trying to update to Firefox 3.6. I'm told I don't have sufficient privileges. Help is appreciated.
== This happened ==
Just once or twice
== trying to update to Firefox 3.6 on a Mac, OSX 10.4.11

See http://kb.mozillazine.org/Installing_Firefox#Mac_OS_X
.....
If you have Mac OS X 10.5 or newer then do this:
Download a new copy of the Firefox program: http://www.mozilla.com/firefox/all.html
Trash the current Firefox application to do a clean reinstall.
Install the new version that you have downloaded.
Your profile data is stored elsewhere in the [http://kb.mozillazine.org/Profile_folder_-_Firefox Firefox Profile Folder], so you won't lose your bookmarks and other personal data.

My error, it should work for 10.4 as well
See
http://www.mozilla.com/firefox/system-requirements.html - Firefox 3.6 System Requirements
http://www.mozilla.com/firefox/system-requirements-v3.html - Firefox 3 System Requirements